[Teareerah]

Fasting is done in private and as a sacrifice unto the Lord (Christian Fasting)

Here are some other examples you may feel free to research:

Observed:
In times of bereavement, of the people of Jabesh Gilead, for Saul and his sons (1Sa 31:13; 1Ch 10:12), of David, at the time of Saul's death (2Sa 1:12), of Abner's death (2Sa 3:35), of his child's sickness (2Sa 12:16,21-23).
On occasions of, public calamities (2Sa 1:12; Ac 27:33), private afflictions (2Sa 12:16), approaching danger (Est 4:16; Ac 27:9,33-34), afflictions (Ps 35:13; Da 6:18), religious observances (Zec 8:19), ordination of ministers (Ac 13:3; 14:23).
Habitual, of the Israelites (Zec 8:19), by John's disciples (Mt 9:14), by Pharisees (Mt 9:14; Mk 2:18; Lk 18:12), by Anna (Lk 2:37), by Cornelius (Ac 10:30), by Paul (2Co 6:5; 11:27).
Prolonged, forty days and nights, by Moses (Ex 24:18; 34:28; Dt 9:9, 18), forty days and nights, by Elijah (1Ki 19:8), three weeks, by Daniel (Da 10:2-3), forty days and nights, by Jesus (Mt 4:2; Mk 1:12-13; Lk 4:1-2).

---------------------------------------------------------

Gramps